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Viewing changes to arch/x86/kernel/apic/bigsmp_32.c

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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arch/x86/kernel/apic/bigsmp_32.c
 
1
/*
 
2
 * APIC driver for "bigsmp" xAPIC machines with more than 8 virtual CPUs.
 
3
 *
 
4
 * Drives the local APIC in "clustered mode".
 
5
 */
 
6
#include <linux/threads.h>
 
7
#include <linux/cpumask.h>
 
8
#include <linux/kernel.h>
 
9
#include <linux/init.h>
 
10
#include <linux/dmi.h>
 
11
#include <linux/smp.h>
 
12
 
 
13
#include <asm/apicdef.h>
 
14
#include <asm/fixmap.h>
 
15
#include <asm/mpspec.h>
 
16
#include <asm/apic.h>
 
17
#include <asm/ipi.h>
 
18
 
 
19
static unsigned bigsmp_get_apic_id(unsigned long x)
 
20
{
 
21
        return (x >> 24) & 0xFF;
 
22
}
 
23
 
 
24
static int bigsmp_apic_id_registered(void)
 
25
{
 
26
        return 1;
 
27
}
 
28
 
 
29
static const struct cpumask *bigsmp_target_cpus(void)
 
30
{
 
31
#ifdef CONFIG_SMP
 
32
        return cpu_online_mask;
 
33
#else
 
34
        return cpumask_of(0);
 
35
#endif
 
36
}
 
37
 
 
38
static unsigned long bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
 
39
{
 
40
        return 0;
 
41
}
 
42
 
 
43
static unsigned long bigsmp_check_apicid_present(int bit)
 
44
{
 
45
        return 1;
 
46
}
 
47
 
 
48
static int bigsmp_early_logical_apicid(int cpu)
 
49
{
 
50
        /* on bigsmp, logical apicid is the same as physical */
 
51
        return early_per_cpu(x86_cpu_to_apicid, cpu);
 
52
}
 
53
 
 
54
static inline unsigned long calculate_ldr(int cpu)
 
55
{
 
56
        unsigned long val, id;
 
57
 
 
58
        val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
 
59
        id = per_cpu(x86_bios_cpu_apicid, cpu);
 
60
        val |= SET_APIC_LOGICAL_ID(id);
 
61
 
 
62
        return val;
 
63
}
 
64
 
 
65
/*
 
66
 * Set up the logical destination ID.
 
67
 *
 
68
 * Intel recommends to set DFR, LDR and TPR before enabling
 
69
 * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
 
70
 * document number 292116).  So here it goes...
 
71
 */
 
72
static void bigsmp_init_apic_ldr(void)
 
73
{
 
74
        unsigned long val;
 
75
        int cpu = smp_processor_id();
 
76
 
 
77
        apic_write(APIC_DFR, APIC_DFR_FLAT);
 
78
        val = calculate_ldr(cpu);
 
79
        apic_write(APIC_LDR, val);
 
80
}
 
81
 
 
82
static void bigsmp_setup_apic_routing(void)
 
83
{
 
84
        printk(KERN_INFO
 
85
                "Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
 
86
                nr_ioapics);
 
87
}
 
88
 
 
89
static int bigsmp_cpu_present_to_apicid(int mps_cpu)
 
90
{
 
91
        if (mps_cpu < nr_cpu_ids)
 
92
                return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
 
93
 
 
94
        return BAD_APICID;
 
95
}
 
96
 
 
97
static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 
98
{
 
99
        /* For clustered we don't have a good way to do this yet - hack */
 
100
        physids_promote(0xFFL, retmap);
 
101
}
 
102
 
 
103
static int bigsmp_check_phys_apicid_present(int phys_apicid)
 
104
{
 
105
        return 1;
 
106
}
 
107
 
 
108
/* As we are using single CPU as destination, pick only one CPU here */
 
109
static unsigned int bigsmp_cpu_mask_to_apicid(const struct cpumask *cpumask)
 
110
{
 
111
        int cpu = cpumask_first(cpumask);
 
112
 
 
113
        if (cpu < nr_cpu_ids)
 
114
                return cpu_physical_id(cpu);
 
115
        return BAD_APICID;
 
116
}
 
117
 
 
118
static unsigned int bigsmp_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
 
119
                              const struct cpumask *andmask)
 
120
{
 
121
        int cpu;
 
122
 
 
123
        /*
 
124
         * We're using fixed IRQ delivery, can only return one phys APIC ID.
 
125
         * May as well be the first.
 
126
         */
 
127
        for_each_cpu_and(cpu, cpumask, andmask) {
 
128
                if (cpumask_test_cpu(cpu, cpu_online_mask))
 
129
                        return cpu_physical_id(cpu);
 
130
        }
 
131
        return BAD_APICID;
 
132
}
 
133
 
 
134
static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
 
135
{
 
136
        return cpuid_apic >> index_msb;
 
137
}
 
138
 
 
139
static inline void bigsmp_send_IPI_mask(const struct cpumask *mask, int vector)
 
140
{
 
141
        default_send_IPI_mask_sequence_phys(mask, vector);
 
142
}
 
143
 
 
144
static void bigsmp_send_IPI_allbutself(int vector)
 
145
{
 
146
        default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
 
147
}
 
148
 
 
149
static void bigsmp_send_IPI_all(int vector)
 
150
{
 
151
        bigsmp_send_IPI_mask(cpu_online_mask, vector);
 
152
}
 
153
 
 
154
static int dmi_bigsmp; /* can be set by dmi scanners */
 
155
 
 
156
static int hp_ht_bigsmp(const struct dmi_system_id *d)
 
157
{
 
158
        printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
 
159
        dmi_bigsmp = 1;
 
160
 
 
161
        return 0;
 
162
}
 
163
 
 
164
 
 
165
static const struct dmi_system_id bigsmp_dmi_table[] = {
 
166
        { hp_ht_bigsmp, "HP ProLiant DL760 G2",
 
167
                {       DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 
168
                        DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
 
169
                }
 
170
        },
 
171
 
 
172
        { hp_ht_bigsmp, "HP ProLiant DL740",
 
173
                {       DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
 
174
                        DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
 
175
                }
 
176
        },
 
177
        { } /* NULL entry stops DMI scanning */
 
178
};
 
179
 
 
180
static void bigsmp_vector_allocation_domain(int cpu, struct cpumask *retmask)
 
181
{
 
182
        cpumask_clear(retmask);
 
183
        cpumask_set_cpu(cpu, retmask);
 
184
}
 
185
 
 
186
static int probe_bigsmp(void)
 
187
{
 
188
        if (def_to_bigsmp)
 
189
                dmi_bigsmp = 1;
 
190
        else
 
191
                dmi_check_system(bigsmp_dmi_table);
 
192
 
 
193
        return dmi_bigsmp;
 
194
}
 
195
 
 
196
static struct apic apic_bigsmp = {
 
197
 
 
198
        .name                           = "bigsmp",
 
199
        .probe                          = probe_bigsmp,
 
200
        .acpi_madt_oem_check            = NULL,
 
201
        .apic_id_registered             = bigsmp_apic_id_registered,
 
202
 
 
203
        .irq_delivery_mode              = dest_Fixed,
 
204
        /* phys delivery to target CPU: */
 
205
        .irq_dest_mode                  = 0,
 
206
 
 
207
        .target_cpus                    = bigsmp_target_cpus,
 
208
        .disable_esr                    = 1,
 
209
        .dest_logical                   = 0,
 
210
        .check_apicid_used              = bigsmp_check_apicid_used,
 
211
        .check_apicid_present           = bigsmp_check_apicid_present,
 
212
 
 
213
        .vector_allocation_domain       = bigsmp_vector_allocation_domain,
 
214
        .init_apic_ldr                  = bigsmp_init_apic_ldr,
 
215
 
 
216
        .ioapic_phys_id_map             = bigsmp_ioapic_phys_id_map,
 
217
        .setup_apic_routing             = bigsmp_setup_apic_routing,
 
218
        .multi_timer_check              = NULL,
 
219
        .cpu_present_to_apicid          = bigsmp_cpu_present_to_apicid,
 
220
        .apicid_to_cpu_present          = physid_set_mask_of_physid,
 
221
        .setup_portio_remap             = NULL,
 
222
        .check_phys_apicid_present      = bigsmp_check_phys_apicid_present,
 
223
        .enable_apic_mode               = NULL,
 
224
        .phys_pkg_id                    = bigsmp_phys_pkg_id,
 
225
        .mps_oem_check                  = NULL,
 
226
 
 
227
        .get_apic_id                    = bigsmp_get_apic_id,
 
228
        .set_apic_id                    = NULL,
 
229
        .apic_id_mask                   = 0xFF << 24,
 
230
 
 
231
        .cpu_mask_to_apicid             = bigsmp_cpu_mask_to_apicid,
 
232
        .cpu_mask_to_apicid_and         = bigsmp_cpu_mask_to_apicid_and,
 
233
 
 
234
        .send_IPI_mask                  = bigsmp_send_IPI_mask,
 
235
        .send_IPI_mask_allbutself       = NULL,
 
236
        .send_IPI_allbutself            = bigsmp_send_IPI_allbutself,
 
237
        .send_IPI_all                   = bigsmp_send_IPI_all,
 
238
        .send_IPI_self                  = default_send_IPI_self,
 
239
 
 
240
        .trampoline_phys_low            = DEFAULT_TRAMPOLINE_PHYS_LOW,
 
241
        .trampoline_phys_high           = DEFAULT_TRAMPOLINE_PHYS_HIGH,
 
242
 
 
243
        .wait_for_init_deassert         = default_wait_for_init_deassert,
 
244
 
 
245
        .smp_callin_clear_local_apic    = NULL,
 
246
        .inquire_remote_apic            = default_inquire_remote_apic,
 
247
 
 
248
        .read                           = native_apic_mem_read,
 
249
        .write                          = native_apic_mem_write,
 
250
        .icr_read                       = native_apic_icr_read,
 
251
        .icr_write                      = native_apic_icr_write,
 
252
        .wait_icr_idle                  = native_apic_wait_icr_idle,
 
253
        .safe_wait_icr_idle             = native_safe_apic_wait_icr_idle,
 
254
 
 
255
        .x86_32_early_logical_apicid    = bigsmp_early_logical_apicid,
 
256
};
 
257
 
 
258
void __init generic_bigsmp_probe(void)
 
259
{
 
260
        unsigned int cpu;
 
261
 
 
262
        if (!probe_bigsmp())
 
263
                return;
 
264
 
 
265
        apic = &apic_bigsmp;
 
266
 
 
267
        for_each_possible_cpu(cpu) {
 
268
                if (early_per_cpu(x86_cpu_to_logical_apicid,
 
269
                                  cpu) == BAD_APICID)
 
270
                        continue;
 
271
                early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
 
272
                        bigsmp_early_logical_apicid(cpu);
 
273
        }
 
274
 
 
275
        pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name);
 
276
}
 
277
 
 
278
apic_driver(apic_bigsmp);